HECS v VET-FEE-HELP
I don't know about the operation of either of these schemes but ...
<pedant mode on>
HECS is aimed at university (degree) courses
VET-FEE-HELP is aimed at vocational (certificate / diploma) courses
<pedant mode off>
They probably operate in a similar manner but will be just different enough that looking up the details of HECS may send you down the wrong path.
regards
layman